The focus of the 3G testing industry is how to quickly and comprehensively test the functions and performance of mobile phones and base stations, including environmental parameters and equipment operations. Its core goal is to shorten the test time and cycle, thereby reducing test costs. Mobile phone design, mass production, base station equipment installation and commissioning, network optimization and Other fields constitute the main targets of 3G testing. With the promulgation of China's TD-SCDMA standard, 3G deployment is just around the corner. What challenges will the test industry face? What solutions will test and measurement equipment providers bring? 1. Rohde & Schwarz (R & S): Provide a comprehensive 3G test solution At present, the challenge facing the testing field is the relative lack of TD-SCDMA test equipment. For TD-SCDMA terminal testing, there is still a lack of a protocol conformance tester, radio frequency conformance test system and audio conformance tester supporting TD-SCDMA on the market, which will affect the development and model approval of TD-SCDMA mobile phones to a certain extent And network access test; for TD-SCDMA network test, there are not many mature TD-SCDMA network coverage test systems on the market, which will affect the deployment and optimization of TD-SCDMA network. Due to the coexistence of the three standards, test vendors need to provide test solutions that can support these three standards. Rohde & Schwarz (R & S) is one of the first manufacturers to launch comprehensive R & D testing, conformance testing, production testing and network testing solutions for these three standards. The program includes: (1) 3G R & D testing: R & S provides a series of universal test instruments, protocol testers, audio testers, and comprehensive testers. These devices support standards such as WCDMA, cdma2000, and TD-SCDMA. (2) 3G conformance test: R & S's powerful certification test system covers protocol, radio frequency, audio and EMC, such as the radio frequency conformance test system TS8950 for GSM / (E) GPRS / WCDMA terminals, protocol conformance Both the tester CRTU and the audio consistency test platform CMU200 + UPL have been applied to major authoritative testing institutions and R & D manufacturers in China. R & S attaches great importance to China's TD-SCDMA standard and keeps track of the latest developments in TD-SCDMA technology, and has been at the forefront of TD-SCDMA conformance testing. (3) Production test: can provide mature solutions for GSM, cdma2000 and WCDMA mobile phone / base station testing. In terms of TD-SCDMA, it is the first to provide a complete TD-SCDMA production test plan. (4) 3G network test: R & S provides a wireless network analyzer TSMU and network optimization software ROMES, and a network coverage system composed of a test mobile phone. This platform supports various communication standards, including GSM / GPRS, cdma2000, and WCDMA. The TSMU coverage field strength test function can also be used for TD-SCDMA network planning and testing. In terms of improving test speed, R & S mainly relies on two aspects: on the one hand, it uses faster devices (such as faster DSP, etc.), and on the other hand, it improves test technology. For example, the R & S spectrum analyzer is significantly faster than similar instruments when testing the code domain power, ACLR, and spectrum of cdma2000, WCDMA, and TD-SCDMA signals. This is because R & S uses special measurement techniques. As another example, the traditional calibration process takes tens of seconds. By using the unique Smart Alignment method, the RF calibration can be shortened from tens of seconds to a few seconds! R & S provides a comprehensive 3G service test solution. The test platform can be based on CRTU or CMU200, and supports standards such as GSM / GPRS, WCDMA, and cdma2000. It can perform MMS, WAP, video telephony, web browsing, video streaming, and other service tests The radio frequency test and signaling monitoring are carried out at the same time as the service test to facilitate further analysis. It is worth mentioning that in order to strictly certify the business support of mobile phones, the OMA (OpenMobile Alliance) organization has formulated some 3G business test cases, some of which have been adopted by GCF or PTCRB and become part of mobile phone certification. R & S launched the CRTU-ATE platform, which can provide flexible solutions for business conformance testing based on the above requirements, and is the first in the industry to support MMS conformance testing. 2. Tektronix: use real-time acquisition technology to obtain all information of the frequency band to be tested The test of the 3G system is an important factor to ensure the operation of the 3G system. In order to obtain better transmission quality and speed, the 3G system uses more complex modulation methods, such as 8PSK, 16QAM, etc. In order to adapt to the different signal quality in the air, it is also possible to use different modulation methods under different conditions of the same connection, also known as adaptive modulation; in addition, the TD-SCDMA standard uses time division duplex TDD technology to make the communication uplink and downlink They share the same frequency, and use time slots to distinguish them; moreover, the 3G system deployed in the 2GHz band requires more base stations than the second-generation mobile communication system, and the system optimization and interference troubleshooting workload are greater. Therefore, in terms of radio frequency, the challenges faced by 3G testing will be demodulation analysis of complex modulation, rapid acquisition and analysis of signals over time, over-the-air system testing (including spectrum monitoring, coverage testing), base station performance analysis, and interference signal analysis And orientation, etc. Tektronix has always been committed to providing 3G test solutions, especially for providing important test instruments during the test of the TD-SCDMA standard with independent intellectual property rights in China. For 3G wireless RF testing, Tektronix provides YBT250 wireless field tester and RSA series real-time spectrum tester, covering all RF and demodulation analysis from base station performance, antenna feeder, and air signal analysis test. RSA series real-time spectrum analyzers have unique trigger, capture and analysis functions, multi-domain time-related test functions, deep storage and playback analysis functions. The instrument supports all three 3G standard RF and demodulation tests. It uses Tektronix 'unique time-domain sampling method to implement a new method of spectrum testing and real-time measurement of signal-related tests. YBT250 supports CDMA2000, EVDO, W-CDMA, HSDPA RF and demodulation tests, TD-SCDMA spectrum test, antenna feeder test and RF air signal analysis. The traditional radio frequency spectrum test is a frequency sweep method, that is, the frequency band to be tested is gradually measured from the low end to the high end according to a certain resolution bandwidth set. Using this method to measure the spectrum results, in a strict sense, events on different frequencies do not happen at the same time. Especially when the resolution bandwidth of the test is small, the measurement time will be longer. In this way, some transient signals with time may not be captured or lost, and the signal changes with time is an important feature of 3G and later wireless communication systems. Tektronix wireless test instruments use a unique front-end time-domain acquisition. After A / D conversion, storage, and FFT transformation, the time of one acquisition includes all the information of the frequency band to be tested, including time domain, frequency domain, and modulation domain information. Tektronix also introduced technologies such as seamless acquisition and overlapping FFT on its tester, which further improves the test speed, thereby meeting the needs of 3G system testing more friendly. The smooth development of 3G services in the future requires stable, reliable and efficient 3G systems, and effective testing is an important step to ensure system quality. In addition to the wireless test solution described above, we also provide mobile signaling test solutions, including simulation and simulation, monitoring and analysis of all interfaces of all 3G systems. The provided instruments are K1297, K15, NSA15 and NSA18. 3. Willtek: Development of high-speed test and high-precision measurement equipment for production needs In terms of testing, the testing of the TD-SCDMA standard is similar to the testing of WCDMA, but since TDMA transmits and receives at the same frequency, this presents new challenges for test equipment. In response to these challenges and the needs of mobile phone manufacturing plants and repair centers, Willtek can currently provide Willtek 4400 series mobile phone comprehensive testers, covering all wireless standards such as GSM / GPRS, EDGE, WCDMA, CDMA2000 and TD-SCDMA, etc. The tester is used for functional test and PCB test optimization with calibration. In the production process, the power level correction is sometimes a complete step with the I / Q regulator, because this allows manufacturers to use cheap devices, which are automatically aligned in order to achieve the required accuracy. The purpose of the functional test is to check the performance of the mobile phone at the back end of the production line, or to perform factory and factory inspections during maintenance. For TD-SCDMA, production test and measurement can already be achieved through the 4405TD-SCDMA test option in our 4400 comprehensive tester series. In other words, the mass production, testing and calibration of TD-SCDMA mobile phones can be achieved through the Willtek4405 mobile phone comprehensive tester. We are now advancing its functional testing. This can help Chinese mobile phone R & D centers to test TD-SCDMA mobile phones in a real environment. Our TD comprehensive tester is also suitable for manufacturing engineers to test TD mobile phones in the production environment, used for the calibration and repair business of TD mobile phones in the maintenance center. in. Shortening the measurement time and accelerating the test speed are also challenges faced by test engineers. Willtek ’s testers and solutions are specifically developed for high-speed testing and high precision in production. The data reading and signal analysis are optimized throughout the process. In the vast majority of cases, a 4405 integrated tester can even complete the measurement of transmission and reception at the same time! In addition, by cooperating with mobile phone manufacturers to simplify test requirements, while maintaining all necessary tests, can also reduce test time. For example, the test in the signaling mode, including setting up the call to the non-signaling mode, where no signal needs to be generated and the call is established, so that the cost of the test signal can be reduced. In the next few years, new 3G services will bring many new requirements for testing. Willtek will introduce a universal, software-based baseband platform that allows customers to adapt to changes in standards through simple software upgrades without having to send the instrument back Make hardware changes. 4. Yokogawa: VC3000 comprehensive tester considers future needs It is optimistic that China will release 3G licenses in mid-2006, including WCDMA, TD-SCDMA, and CDMA2000, of which WCDMA and CDMA2000 have been commercialized in Europe and the United States. Both devices and terminals have relatively complete test instruments for functional testing. For the TD-SCDMA standard, the corresponding test equipment is not perfect. Only some test equipment suppliers provide some discrete equipment to test each test item, especially the test terminal. At present, there is no commercially available test equipment to complete the Test of all items of order and RF parameters. In the future, the GSM network + WCDMA network + TD-SCDMA network will operate simultaneously in the Chinese market. In this way, the test equipment of the terminal needs to support the testing and system switching of these networks at the same time. In response to these needs and challenges, Yokogawa has launched the VC200 series mobile phone comprehensive tester, which is mainly used in the final test and maintenance market of the production line. Due to its low cost and versatile characteristics, it has been in the European 3G aftermarket in a short time Gained a large share. The upcoming VC3000 series mobile phone comprehensive tester is a high-end tester. It comprehensively considers the future needs of the Chinese market at the early stage of design, and supports WCDMA + GSM + EDGE + TD-SCDMA standard mobile phone testing. And because its main customer goal is the production line calibration test, some test items that are not related to production are streamlined during design, and three modes of automatic, manual, and non-signaling (RF) testing are provided. The operation is very simple, suitable for production line engineers. Their customers can use LAN, GPIB and other interfaces for remote control, and programming is very simple. Under the circumstance of ensuring that the product performance reaches the same performance as other high-end test instruments, the price is only half of that of similar instruments, which is very beneficial to the current decreasing demand for mobile phone costs. Taking into account the test speed requirements of the mobile phone production line, Yokogawa uses the latest high-speed DSP chip for data processing. The instrument can test all typical RF parameters in 0.2 seconds, thus ensuring the high-speed measurement requirements of the production line test. The simple man-machine interface can also ensure that customers can see the test items they are concerned with at a glance, thereby saving operation time. In order to meet the needs of more 3G services, including mobile TV services, mobile high-speed Internet access and GPS services, VC3000 series testers have taken into account these future requirements in RF hardware design based on the existing support for GPRS / EGPRS. We have begun to consider testing support for these services, and will provide support for these new services through software updates at an appropriate time in the future. summary It can be seen from the solutions, new technologies and test methods of the major test and measurement equipment providers that fast integrity testing to ensure the function and performance of mobile phones / base stations will be the focus of competition in the 3G test industry. Among them, consistency The test problem is the most critical, and the upgradeability of the test equipment software is also crucial for reducing test and measurement costs and accelerating the test process of 3G equipment deployment. Spot Marker,Vinyl Spot Markers,Cheap Spot Markers,Gym Floor Markers Ningbo Gibbon Sports Culture Co.,Ltd , https://www.gibbonsports.com